On a recent trip to Jacksonville, Fla. via Delta, I had a disquieting thought. The flight attendants were so friendly, so generous with their drinks and snacks that I felt guilty about the scene in my debut novel “Water Music” in which an officious flight attendant denies tennis star Evan Conor Fallon an extra package of nuts, precipitating an international incident known thereafter as “Nut-gate.”

Mulling the gracious treatment I have always received while flying, I wondered how fair and realistic I had been with Nut-gate. Mustn’t fiction reflect life?

Then while at the beach house my sisters had rented on Amelia Island, I read the introduction to Alvaro Enrigue’s intriguing new novel “Sudden Death” (Riverhead Books, $27, 261 pages) – about an imaginary 16th century tennis match between the Italian painter Caravaggio and the Spanish poet Francisco de Quevedo – in which he writes something that buoyed me so much I felt as if I had made a new friend: ...